Destiny 2‘s newest mode Onslaught has landed well with guardians following the Into the Light update. Onslaught is simple: Kill the enemies, throw the batteries in the base, earn rewards. But a few clever players have found an unintended interaction with the batteries that have made life so much easier.

Instead of throwing the ADU batteries into the ADU, you can instead throw them at the defenses you helped construct—and in doing so, repair them if they are damaged. A clip of the interaction from Twitch streamer Onpam was shared on April 13, and already the community is taking notice. Even better, the battery can be picked up, meaning that with enough time, you can use a single battery to fix all of your defenses before depositing it into the ADU for that all-important scrap.